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. 2023 May 5;5:100074. doi: 10.1016/j.sleepx.2023.100074

Table 6.

Association between insomnia (Insomnia Severity Index) and different types of infection.

Insomnia Severity Index
χ2 (df) p-value1
No insomnia Subthreshold Insomnia
Common cold 1.5 (2) 0.476
 No 187 (50.3%) 161 (50.0%) 91 (45.3%)
 Yes 185 (49.7%) 161 (50.0%) 110 (54.7%)
Throat infection 14.8 (2) <0.001
 No 343 (92.2%) 272 (84.7%) 165 (82.1%)
 Yes 29 (7.8%) 49 (15.3%) 36 (17.9%)
Ear infection 6.6 (2) 0.037
 No 360 (96.8%) 310 (96.6%) 186 (92.5%)
 Yes 12 (3.2%) 11 (3.4%) 15 (7.5%)
Sinusitis 7.2 (2) 0.027
 No 345 (92.7%) 279 (86.9%) 176 (87.6%)
 Yes 27 (7.3%) 42 (13.1%) 25 (12.4%)
Pneumonia/bronchitis 9.5 (2) 0.009
 No 364 (97.8%) 308 (96.0%) 186 (92.5%)
 Yes 8 (2.2%) 13 (4.0%) 15 (7.5%)
COVID-19 1.7 (2) 0.432
 No 298 (80.3%) 265 (82.6%) 170 (84.6%)
 Yes 73 (19.7%) 56 (17.4%) 31 (15.4%)
Influenzalike illness 16.8 (2) <0.001
 No 283 (75.9%) 207 (64.5%) 123 (61.2%)
 Yes 90 (24.1%) 114 (35.5%) 78 (38.8%)
Skin infection 14.4 (2) <0.001
 No 313 (84.1%) 240 (74.5%) 145 (72.1%)
 Yes 59 (15.9%) 82 (25.5%) 56 (27.9%)
Gastrointestinal infection 36.1 (2) <0.001
 No 325 (87.1%) 259 (80.7%) 133 (66.2%)
 Yes 48 (12.9%) 62 (19.3%) 68 (33.8%)
Urinary infection 0.1 (2) 0.940
 No 353 (94.6%) 304 (94.7%) 189 (94.0%)
 Yes 20 (5.4%) 17 (5.3%) 12 (6.0%)
Venereal disease 1.1 (2) 0.570
 No 367 (98.7%) 314 (97.8%) 196 (97.5%)
 Yes 5 (1.3%) 7 (2.2%) 5 (2.5%)
Eye infection 10.9 (2) 0.004
 No 353 (94.9%) 293 (91.3%) 175 (87.1%)
 Yes 19 (5.1%) 28 (8.7%) 26 (12.9%)

χ2, Pearson chi-square. df, degrees of freedom. Significant results are indicated in bold.